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Show David Pitcher, P. E., Chief Engineer Central Utah Water Conservancy District May 21, 1997 Page 4 3.1 Description of Historical Modeling Data and Assumptions ( p. 22) It is error to develop a maximum monthly limit from historical data to control the storage of Provo River water in Deer Creek Reservoir. PRWUA is entitled to the maximum storage allowed by the PRP water rights, which is not limited by historical storage, particularly during those years when full development under the PRP had not yet occurred. The term " flood control releases" should be deleted, since flood control is not an authorized purpose of the PRP. 3.5 Conclusions Regarding the Historical Simulation ( p. 23) In view of the above comments relating to omission of the Operating Agreement and demands for June sucker flows, PRWUA questions whether the simulation has demonstrated that PROSIM is capable of accurately replicating the processes that influence flows, reservoir storages, and diversions on the Provo River System, or that simulation of future scenarios using this model should yield results that can be used for future water resources planning and operational decision making purposes. However, it is noted that the accuracy and predictive value of PROSIM results may be decreased if operating policies are used on the Provo River System, but are not included in the institutional arrangements modeled by PROSIM. Therein lies the problem about which PRWUA is concerned. 4.1.3 Demands ( p. 26) The assumption in Table 4- 1 that PRP demands are set at 100,000 acre- feet per year should be adjusted upwards to include " extra allotment" water, i. e., water in excess of one acre foot per share of PRWUA stock and stockholders7 holdover water. Such is provided for in PRWUA's 1936 Repayment Contract under Articles 14 and 15 thereof and under paragraphs 13 and 17 of the Operating Agreement. 4.1.4 System Storage Rules ( p. 27) The statement in the first paragraph that Utah Lake storage rights are senior to those of the upstream reservoirs is not totally accurate. Thus, Water Right Nos. 55- 7060 and 55- 7061 covering 3400 AF of storage in Deer Creek Reservoir during the irrigation season comprise the prior consumptive use on the Deer Creek Reservoir lands and never reached Utah Lake. Accordingly, the storage of those waters in Deer Creek Reservoir are prior to the storage rights in Utah Lake. The foregoing is reflected in the comments of PRWUA to the State Engineer dated January 31, 1992 relating to the Proposed Distribution of Water Within Utah Lake Drainage Basin and the response thereto of the Utah State Engineer dated April 3, 1992. |